<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>

</head>
<script src="vue.js"></script>
<body>
    
      <div id="app">

          <input v-model.lazy="message" placeholder="编辑我……" >

          <button v-on:click="add">添加</button>


          
          <ul>
              <li v-for=" (item,index) in good" :key=index>
                {{item}}
              </li>
          </ul>
          
      </div>
    
      <script>
          var app = new Vue({
            el: '#app',
            data: {
              message:'',
              good:[]
              
            },
            methods:{
                add(){
                    this.good.push(this.message)
                        this.message = ''
                }
            }
          })
      </script>
      </body>
</html>